80840730 has 16 divisors (see below), whose sum is σ = 194017824. Its totient is φ = 21557520.

The previous prime is 80840717. The next prime is 80840737. The reversal of 80840730 is 3704808.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2694691 = 80840730 / (8 + 0 + 8 + 4 + 0 + 7 + 3 + 0).

It is not an unprimeable number, because it can be changed into a prime (80840737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1347316 + ... + 1347375.

It is an arithmetic number, because the mean of its divisors is an integer number (12126114).

Almost surely, 2^80840730 is an apocalyptic number.

80840730 is an abundant number, since it is smaller than the sum of its proper divisors (113177094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80840730 is a wasteful number, since it uses less digits than its factorization.

80840730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694701.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 80840730 is about 8991.1473127738. The cubic root of 80840730 is about 432.3910960167.

The spelling of 80840730 in words is "eighty million, eight hundred forty thousand, seven hundred thirty".